Piston-rod toggle for fluid-pressure motors



W. H. KELLER AND A. SCHINKEZ.

PSTON ROD TQGGLE FOR'FLUID PRESSURE MOTORS. APPLlcATmN FILED APR. 29. 1920.

. 1,398,327, Patented NOV. 29, 1921,.,

UNMI" WILLIAM I. AND ALBERT SCHEEEZ, OF Gillet-.15B HAVEN, JICHGAN, f ASSGNCRS ".'LO KELLER :ENEUATC IGOL UUHPANY, 0F GRAND HAVEN, f MICHGN, A CEPURATN Gl? MICHGLN. y

PISTGN-ROD TGGLE FOR EII'DeliRESSRT. IVIOTORS.

Speclcaton of Letters Patent.

iPate-nted Nr. l, 192 i.,

'Application filed April 29, 1920. Serial No. 377,506. f

To all fic/rom t may concern:

Be it lrnown that We, liv/*intimi il. KELLER, a citizen of the United States, and ALBERT Sor-niente, aytorrner subject ot the Emperor ot' Austria, both residing at Grand Haven,

. in the county oi Gttawa and State ot Michigan, have invented certain nev.T and usel'ul linproveinents in Piston-Bod Toggles for Fluid-Pressure litotors, et which the following is a specification.

lhis invention relates generally to a novel construction in fluid pressure motors of the type used in portable drills, 1pneumatic tools and the like, and relates `moreparticularly to the piston rod connections, lrnovvnas toggles, which coact. with thecranlz shaft.

service.

These objects we attain by a novel structure the parts v-.fhich may be stamped out o'lf sheet 'inotah and which comprise siinplied and strengthened nfiean's for mounting thein kon the piston rod and crank shaft wherein a considerable amount of labor is saved inV the manufacturing, assembly and subsequent repair et a inotor, and the lite oi the structurein service is increased,

.lt is the cornrnon practice, in the rnotor of this class, to arrange a plurality oit cylinders about a coinnion cranlr sha'tt, the cylinders ,being singularly disposed in pairs in which the pistons are operatively connected `in pairs with one crank bearing. .Hinged toggles are usually employed, one overlying the other, which are secured to tlieirrespectiyepiston rods by ineans ot binding nut engaging the toggle ends. ln the usual construction it is tound that the toggle hinges l frequently shear` olli, ad that the binding nuts split under the s i ot service. ilsol, theton'gles novv coininoiily used niade oi toi-ginas requiring inany machining); operations in tb ir manufacture, and they are very ult to assemble in the rnotor due to their design and the necessarily restricted space inthe crank case.

These objectionable features are avoided inthe structure ydisclosed inthis invention, as will be apparent, with other advantages, inthe tollowing` speciication, of one embodiment ot the invention.

the drawings, Figure 1 sectional View a pair oi pistons, showing the piston rods and toggle connections in elevation. rihe cylinders, valve mechanism and ycranlrcase are'indicated in outline as einbodied in the preterred structure described in our .pending` application, Serial No. 228,570, filecipril 15, 1918. Fig. 2 represents a side elevation oi" :a piston rod with toggles assembled. Fig'. 3 represents in perspective the parts et a pair oi toggles. Fig. shows an alternative construction for the outer toggle members. f

numerals 1 and 2 indicate a pair of cylinders arranged with their axes ln F 1,

an angle and in a confiinon plane. The tons 3 and et operating therein carry pisi rods 5` and 6 to which are secured the represents' in toggles 'l' and 8. Toggle 7 has its bearing a directly upon the crank journal 9, While tou-ele 8 overlies and has its bearing upon valve inechanisin `associated Tjfi crank case, indicated at 11, has two lateral openings 12, which are closed by removable 1lates and desio'ned to rovide access tor t ie assembly or repair of thetoggle connections.

' rlhe toggles are ot two piece construction.

19 20 to receive a clamping bolt. The

nieinbe 13 has va tongue 21 termed on its outer edge adapted to a recess 22 :termed in the abuttingedge otthe inernber lll, designed-to secure them in relative position when asserribled,k Gilingholes ai'e provided at 23 and 24. Journals are toi-ined at 25 and 26 for the bearings ot the overlyinn' toggle 8.

ln assembled position the extensions 17 and'18 abut on their inner faces 'and are adapted to be rigidly clainned to the piston rod 5 by en ement Within and abutting` the base ot yoke formed by the recess 27 cut in the outer end or the piston rod. The yoke arms are bored transversely at 2S, in

register With/the holes `19 and 2O in the toggle members. The assembly is secured in ,position by the clamping bolt 29, having threaded engagement vvith the yoke. l lock Washer 30 may be seated in a recess 3l formed on the yoke, and provided With straps 32 which may be bent up against the lateral faces ot' the bolt head. A slot 33 Amay-be cut longitudinally at the base of the recess 27, to give uniform bearing of the oke arms in Ciampinothe toggle members.

\ f3 ZMS The outer toggle 3 also comprises tivo 4members 34 and 35, having lateral extensions l36 and 37, perforated at 33 and 39. The tivo members 34 and 35 are secured to their rey spective piston rod 6 byineans similar to that just described tor the members in the inner toggle 7. VThe members 342 and 35 are formed With curved straps l0 and il Whose internal surfaces are adapted tobear fupon the Ajournals andQG lormedon the jiniier toggle members. Inassembled posi# y tion the extensions 17 and 13 on the 4inner `formed to snugly engagethe roll and intor- -lock the toggle members `toggle 'members extend through the aperture formed between the straps l0 or ll, as `may 'be selected, and operatively swung therein. vThe straps l0 are integrallyconnected at their outer ends by a cross bar l2 which is formed into a Wide hook lia-ving anlinvvardly proJect-ing lip The straps 4l also are integrally connected at their outer ends b acurved cross bar lf/ladapt- AVed to coniornit@ the inner sur A bfarfland to interlock the progecting Veni 45`With the lip 4:3, thus positively securin the engagement oit the members 3d 35 in their assembled position about the underlying toggle members.

In the modified structure shovrn in? fl, the inner cross bar may be (shaped in a 44, to be embraced Within the hook It will be seen that Wefliave produced a simplified toggle structure which Will be apparent-to' one skilled in the art as being capable or" manufacture by simple and inexpensive die and. press operations on sheet metal. 'It Will be evident also that the rmethod of connecting the members to the piston rod greatly simplifies their assembling and repair in a motor, in that' the few necessary operations may be quickly and conveniently done through the rlhis herein shown, as various modifications may be made Within the scope of the appended claims.

lNe claim as our invention l. ln adevice of the class `described having tivo cylinders arranged at an angle to each other, pistons therein, and' a crank shaft, thev combination oit tivo piston ro'ds,`

each having an end engaged `with one of Vsaid pistons, the opposite end forming a yoke, a tivo-piece toggle connection having a rotatable bearing on said crank shaft and rigidly clamped in the yoke on one of the said piston rods, a two-piece toggle kconnection-havin@ reci rocal bearing on the first mentioned toggle connection and rigidly 'clamped inthe yoke on the other or the said pistoiiiocls, and interlockingmeans carried en the outer ends over the 'full ividtlioithe tivo members of the second mentioned toggle connection. l y

2. In a device of the class described having tvvo cylinders arranged at an angle to each other, pistons therein, and a crank shaft, the combination of a piston rod :in

each oic said cylinders having lengagenient with the-piston'tliei'ein at oneend, the other end of the piston rod forming a yoke, a transverse 4bore through the armsot said yoke,'a bolt through said bore .haviiigiscrew 'threaded y'engagement' therewith, a lock Washer on said bolt'laterally i'iXed ina recess on the adjacent face oi'said yoke, ra tivopiece'toggle having a direct bearing on said crank shaft. and 'having lateral extensions thereto,- said extensions being in abutting osition Within the oke on one of said piston rods and perforated transversely kto register with the bore in sai-d yoke and thereby rigidly'claniped Within said "yoke by means of said' bolt, a tivo-piece toggle having its bearing upon the first mentioned toggle and having lateral extensions thereto, said extensions being in abutting position Within the yoke on the other 'or saidlpiston rods and perforated transversely tri-register withV the bore insaid yoke and' thereby -rigidly clamped Within said yokebymeans of said bolt, and meansjor interlocking'the outer ends of the tivo members ol thesecond mentioned toggle comprising an integral outer lhook on. the one member and 'anV integral inner i hook on thel other member adapted to positively interlock, said'hooks extending the full Width of the' toggle'members.

lll)

iis

`3. A fluid pressure motor having' two cylinders in angular relation to each other, pistons therein, a crank shaft, and a crank case, in combination with two piston rods 'each having anend connected ivitli oneot said pistons, the opposite end 'carrying boltsecured clamping means, a separable part toggle connection bearing upon said crank shaft and rigidly-clamped to one ofsaid piston rods, a separable part toggle con-il nection bearing upon. the first mentioned toggle connection and rigidly clamped to the other of said piston rods, inter-engaging means for locking in operative position the outer ends of the separable parts ot the second mentioned toggle connection, said `means interengaging over-the `full width of said parts, and means of access' laterally through said crank case ada tedto er: Jose rprojecting tongue on its outer endadapted to engage a recess formed in the abutting end of the other member, said members having abutting llateral extensions which are rigidly clamped within the yoke on one of said piston rods, an outertoggle composed of two members each of said members comprising, spaced curved straps integrally joined at their base to 'form lateral eXtensions, said extensions abutting and being rigidly clamped in the yoke on the other of the said piston rods, said curved straps being adapted to bear upon journals formed on the inner toggle and providing a spaced aperture ior the operative connection between the inner too` 'le and its iston rod a cross bai' integrally connecting the outer ends of the straps of one or' said members, forming a hook oi the width of said member and carrying an inwardly extended lip at its end, and across bar integrally connecting the outer ends of the straps of the other of said members also of full width and formed to engage the inner face of said hook end interlock therewith by` abutting the said 5. Means 'for connecting' a crank with a pair of reciprocating elements comprising an inner toggle and an outer toggle stamped from sheet metal, theinner toggle composed ci two complementary members each having a semicylindrical bearing portion adapted to embrace the crank,r and each having a laterally projecting. ear adapted for bolted attachment to a connecting rod, one member having on the side opposite the ear a tongue adapted to engage a corresponding recess in the complementary side ot the other member, the outer toggle composed ot two complementary members each having spaced curved portions adapted to embrace the bearing portion ot the inner toggle, the curved portions integrally joined at their ends to form'on one side of each member a laterally projecting ear adapted for bolted attachment yto ya connecting rod,

the opposite side ot the curved portions in one member being integrally joined to form hook of the full width of said member having an inwardlyY extended locking element, the other member having its complementary curved portions joined integrally to `form a cross bar adapted to engagethe inner surface and interlock with the said hook over its full width.

A 6.V ln a liuid pressure motor, an linner toggle vconnection comprising twov complementary members stamped from sheet metal, each of said members having semicylindrical bearing portions adapted to embrace a crank shaft, the members being formed with lateral ears transversely perforated and adapted to be attached to av piston rod,^one of said members having a tongue on the side ot the bearing portion opposite the said ear, the second member carrying a comple-y mentary recess in its bearing portion to engage said tongue.

In a duid pressure motor, an outer toggle connection comprising two complementary members stamped from sheet metal, each of said members having two spaced straps cylindrically curved and adapted to embrace in bearing engagement an innerv toggle, the straps being integrally joined at their ends by cross elements, c the two complementary cross elementsk on one side forming lateral ears transversely perforatedr and adapted to be attached to a piston rod, the complementary cross elements on the opposite side having interlocking means composed of a curved portion formed on one element having an angularly disposed lip at its end extending inwardly the full width oi' the member, and a second curved portion Vformed on the other or" said elements adapted to conform to and engage the inner sur- .itace of the iirst curved portion, its end abuttingaiid interlocking with the said lip.

8. In a fluid pressure motor, connecting means between a piston rod and its toggle y comprising a piston rod having a bifurcated end forming a yoke adapted to embrace the extended ears 'of a toggle, a transverse bore through the arms of the yoke registering sov with holes in said toggle ears, and a recess j formed on the outer face of one arm .concentiically with said bore, a bolt adapted to pass through the bore and engage the larms ot said yoke in rigid clamping engagement with said toggle ears, and a lock washer seated in said recess having lateral projections to'be forced ag'ainst thehead of said bolt and prevent rotation thereof.

9. ln a liuid pressure motor, a toggle connection comprised of two complementary members each having means of attachment to a piston rod and having spaced curved ,bearing7 thestraps in one of said members being integrally joined to form-an out- :wardly curvedhook of thefull width of ysaid Vmemberand carrying'fan inwardly extended lip at its end, andthe straps in the other of said members *being integrally joined to form a ooniplementaryhook of similar width adaptedtoengage the inner face of the first mentioned hook and interloclctherewith by abuttngfthe said lip.v

10. In a fluid pressure motor, a toggle Y Yconnection comprising :two complementary set our hands.

piston rod and having-spaced curvedfstraps `forming half of -a rotatable bearing, the

straps in one of said members being inte-V grally joined by a oros`s1element, and the lstraps. in the otherof said members being integrally'j oined to form a Curved hook adapted to receive the said cross element and interlock therewith. Y

`I nrtestimony whereof we have hereunto WILLiAM H. KELBER. ALBERT SCHINKEZ. l 

